The following information shows the result of the orbit fit based on Gary Bernstein's method. Most of the information should be self-explanatory. Take special note that while the original Bernstein software works with barycentric coordinates, we convert these results into a heliocentric coordinate system.
# Object: 17BG241
# Created Wed Jul 17 01:11:29 2024
# Orbit generated from Bernstein formalism
# Fitting 8 observations of 8
# Arc: 26.01d
# First observation: 2017/01/28
# Last observation: 2017/02/23
# WARNING Fitting with energy constraint
# WARNING and with gdot fixed = 0
# WARNING MRQMIN stopped after 13 iterations -- oscilliatory solution
# Chi-squared of fit: 3.11 DOF: 12 RMS: 0.11
# Min/Max residuals: -0.21 0.22
# Exact a, adot, b, bdot, g, gdot:
1.317601E-05 1.935455E-02 1.150367E-07 3.816612E-04 2.150722E-02 0.000000E+00
# Covariance matrix:
3.8891E-11 5.3167E-08 -1.6528E-12 -2.2479E-09 1.2035E-08 0.0000E+00
5.3167E-08 7.3235E-05 -2.2765E-09 -3.0962E-06 1.6577E-05 0.0000E+00
-1.6528E-12 -2.2765E-09 3.5889E-13 9.2217E-11 -5.1528E-10 0.0000E+00
-2.2479E-09 -3.0962E-06 9.2217E-11 1.3105E-07 -7.0083E-07 0.0000E+00
1.2035E-08 1.6577E-05 -5.1528E-10 -7.0083E-07 3.7522E-06 0.0000E+00
0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 1.3091E-04
# lat0 lon0 xBary yBary zBary JD0
2.349283 -172.966096 0.842686 0.021161 -0.511739 2457782.096181
# Heliocentric elements and errors
Epoch: 2457780.5000 = 2017/01/27
Mean Anomaly: 213.30031 +/- 239.846
Argument of Peri: 212.12615 +/- 204.509
Long of Asc Node: 122.72572 +/- 30.820
Inclination: 2.60037 +/- 0.704
Eccentricity: 0.03496908 +/- 0.5914
Semi-Major Axis: 45.66822524 +/- 22.2792
Time of Perihelion: 2503715.7761 +/- 298665.8
Perihelion: 44.07124929 +/- 34.5210
Aphelion: 47.26520119 +/- 35.5124
Period (y) 308.6238 +/- 225.84
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -46.72204669 +/- 4.1527
Ecliptic Y -4.92006622 +/- 0.5121
Ecliptic Z 1.90592258 +/- 0.1717
Ecliptic XDOT 0.00030657 +/- 0.0014
Ecliptic YDOT -0.00245173 +/- 0.0009
Ecliptic ZDOT 0.00004848 +/- 0.0001
# Distances at JD0 (AU)
Heliocenter to KBO 47.01903060 +/- 4.1268
Geocenter to KBO 46.49601925 +/- 4.1877
# Hcoef: 8.36
The following table shows the complete astrometric record for 17BG241. The first three columns show the date of observation. The next six columns are RA and DEC. The next column (when provided) is the observed magnitude and filter. The next column is the object name (17BG241) followed by the observatory code and reference code for the source of the astrometry.
2017 01 28.59538 12 29 32.88 -00 38 01.5 24.1z 17BG241 T09 C~86um 2017 01 28.60345 12 29 32.85 -00 38 01.5 25.0z 17BG241 T09 C~86um 2017 01 28.61148 12 29 32.83 -00 38 01.1 24.7z 17BG241 T09 C~86um 2017 01 28.61691 12 29 32.82 -00 38 01.1 25.0z 17BG241 T09 C~86um 2017 01 28.62228 12 29 32.82 -00 38 01.0 24.2z 17BG241 T09 C~86um 2017 02 23.53583 12 28 26.69 -00 29 44.7 25.6r 17BG241 T09 C~86um 2017 02 23.56346 12 28 26.62 -00 29 44.2 25.7r 17BG241 T09 C~86um 2017 02 23.60592 12 28 26.47 -00 29 43.2 25.5r 17BG241 T09 C~86um
The following table shows the residuals to the orbit fit. The first coumn is the point number. The second column is the time, in years, measured from the first observation. The third and fifth columns are the regularized positions used in the orbit fit. The fourth and sixth columns are the residuals, in arc seconds, for RA and Dec respectively.
1 0.0000 0.00 0.22 0.00 0.03
2 0.0000 -0.41 0.05 -0.18 -0.16
3 0.0000 -0.85 -0.14 0.07 0.07
4 0.0001 -0.98 -0.12 0.01 -0.01
5 0.0001 -1.02 0.01 0.10 0.07
6 0.0710 -1108.30 -0.21 64.45 0.01
7 0.0711 -1109.46 0.16 64.49 0.01
8 0.0712 -1111.93 0.05 64.52 -0.02
The following table comes from a 10My integration of the orbit of the object. Three columns are shown. The first column is the result of integrating the nominal orbit. The other two columns are based on clones of the nominal orbit that are +/- 3 sigma from the nominal orbit. If all three types agree then the classificiation is deemed secure. The basis for these calculations is described in more detail in AJ, 129, 1117 (2005). Any use made of these calculations should refer to and credit this publication and the Deep Ecliptic Survey Team.